JP5792013B2 - Bag box for packaging machine - Google Patents

Description

  The present invention relates to a bag box for a packaging machine that sucks a plurality of packaging bags stacked in a flat shape in a storage box with a suction cup and supplies the packaging bags to the packaging machine at regular time intervals.

FIG. 2 is a partially enlarged view of a conventional packaging machine bag box of Patent Document 1. As shown in FIG. In this packaging machine bag box, a large number of packaging bags 10 are laminated in a plane on the lifting plate 11 of the storage box 12, and the packaging bags 10 are taken out one by one from the top, and the amount of lamination gradually decreases. As it goes on, the elevating plate 11 rises so that the upper surface of the packaging bag 10 is always kept constant.

  The supply mechanism 20 for supplying the packaging bag 10 to a packaging machine (not shown) has a lever structure as shown in FIG. That is, the lower end of the main lever 22 is pivotally supported with respect to the bearing 21 via the pipe-shaped main shaft 23, and one end of the sub lever 25 is fixed to the sub shaft 24 inserted into the hollow portion of the main shaft 23. A triangular support 27 provided via a pin 26 at the upper end of the main lever 22 is also connected to the sub lever 25 via a link 28. Two parallel guide rods 34 are supported by the support body 27 across the upper portion of the storage box 12. A block 29 is fixed to the two guide rods 34, and a suction cup 30 is provided at the tip of the block 29.

  With the clockwise rotation of the sub lever 25, the support 27 rotates in the direction of the arrow 31a with the pin 26 as a fulcrum, presses the suction cup 30 against the upper surface of the packaging bag 10, and the packaging bag with the suction force acting on the suction cup 30 through the tube 32 10 is adsorbed. Further, when the support lever 27 is rotated in the direction of the arrow 31b by the sub lever 25, only the uppermost packaging bag 10 is lifted, and then the main lever 22 is rotated clockwise, the packaging bag 10 supported by the suction cup 30 is wrapped. Supplied to the machine.

  The bag box for a packaging machine disclosed in Patent Document 1 is a rotary type packaging machine. For example, when a trouble has occurred in which a package bag is not filled with an article to be packaged, It was released from the clamp, and usually this opened packaging bag was not reused due to hygiene problems.

  In order to eliminate the waste as described above, in the rotary type packaging machine of Patent Document 2, when the filling of the article to be packaged is not confirmed by the sensor, the opening of the clamp holding the packaging bag is stopped and the packaging bag is stopped. The so-called recycle is performed in which the re-rotation is performed while the clamp is held by the clamp and the refill is performed at the filling position.

  In the rotary type packaging machine of Patent Document 2, when the recycling clamp comes to the supply position of the packaging bag, the suction suction of the suction bag is stopped by eliminating the vacuum suction force of the suction cup on the bag box side. Has stopped supplying packaging bags to rotary packaging machines.

JP-A-10-167222 Japanese Patent Laid-Open No. 01-124521

However, in the bag box of Patent Document 2, the suction cup stops suction, but the mechanism for supplying the packaging bag (in FIG. 2, the supply mechanism 20, the main lever 22, the sub lever 25, the link 28, etc.) is driven. Therefore, the sucker continues the empty operation of pressing the upper surface of the packaging bag, so that the position of the upper packaging bag may be shifted. If the position of the packaging bag is shifted by this empty operation, the position where the suction cup is adsorbed when the packaging bag is supplied to the rotary packaging machine is shifted. If the suction of the suction cup is deviated, problems such as a clamping error, a filling error, and a seal position deviation occur.

The present invention provides a bag box for a packaging machine having a so-called recycling mechanism, which can prevent a deviation of the packaging bag due to an empty operation by a suction cup when supplying the packaging bag to a rotary type packaging machine, for example. The purpose is to do.

The bag box for a packaging machine according to the present invention is a bag box for a packaging machine in which an upper part of a storage box for storing stacked packaging bags is provided with a suction cup that sucks the packaging bag and lifts it to supply the packaging machine A crank mechanism that transmits rotational force to the suction cup from a drive shaft that is rotated by a drive motor, and a drive transmission mechanism that transmits and blocks the drive force of the drive shaft between the drive shaft and the crank mechanism. Is provided with a fixing mechanism for fixing the crank mechanism so as not to cause a positional shift by pressing the upper surface of the packaging bag by an empty operation .

The drive transmission mechanism can transmit or shut off the rotational force of the drive shaft to the crank mechanism. The fixing mechanism stops the movement of the crank mechanism and restricts the swinging movement of the suction cup.

  According to the present invention, when the packaging bag is supplied to the packaging machine having a so-called recycling mechanism, the present invention prevents the packaging bag from being displaced due to the suction cup contacting the packaging bag due to the emptying operation by the suction cup.

Partial enlarged view of a packaging machine bag box of the present invention Partial enlarged view of a conventional packaging machine bag box

Below, the bag box for packaging machines of this invention is demonstrated using drawing. FIG. 1 is a partially enlarged view of a bag box for a packaging machine according to the present invention. The packaging machine bag box of FIG. 1 omits the storage box 12 for stacking and storing the packaging bags of FIG. 2, the lifting plate 11 for raising the packaging bag 10, and the like.

In the supply mechanism 40, the driving force is transmitted from the drive shaft 41 to the parallel link mechanism 43 via the crank mechanism 42 to swing the suction cup 44. The drive shaft 41 is driven by a crank mechanism from a drive motor (not shown). The driving force is transmitted through the cam mechanism and the cam mechanism is always rotating in the forward and reverse directions. A support plate 45 supports the drive shaft 41. In this embodiment, the rotation means to repeat the rotation in the forward and reverse directions (clockwise and counterclockwise), and the rotation means a state in which the rotation is in one direction. Rotation is used to indicate the state of the moment of turning in the direction.

One end of a swing arm 46 is fixed to the drive shaft 41, and the swing arm 46 repeats a reciprocating motion to the left and right at a constant cycle around the drive shaft 41 as the drive shaft 41 rotates. . Further, a drive transmission cylinder 47 (drive transmission mechanism) is connected to the tip of the swing arm 46. The drive transmission cylinder 47 transmits the reciprocating motion of the swing arm 46 to the crank mechanism 42, and a general air cylinder is used. The drive transmission cylinder 47 is connected to an air source via a speed exhaust controller 48 and a solenoid valve 56. The speed exhaust controller 48 controls the operating speed of the drive transmission cylinder 47. The drive transmission cylinder 47 normally transmits the driving force of the drive shaft 41 to the crank mechanism 42, but has a function of temporarily preventing transmission during so-called recycling.

The tip of the telescopic rod 47 </ b> A of the drive transmission cylinder 47 is connected to the crank mechanism 42. The crank mechanism 42 includes a boomerang-shaped rotating plate 42A and a connecting rod 42B connected to the rotating plate 42A, and transmits the rotational force of the drive shaft 41 to the parallel link mechanism 43.

The rotation plate 42A is supported at its base end by a shaft 42a on a frame (not shown), and is rotatable about the shaft 42a as indicated by a solid line and a virtual line. The connecting rod 42B is pivotally supported at the tip of the short portion of the rotating plate 42A. Further, the telescopic rod 47A of the drive transmission cylinder 47 is pivotally supported in the middle of the long portion of the rotating plate 42A, and the fixed rod 49A of the fixed cylinder 49 (fixing mechanism) is pivotally supported at the tip.

The fixed cylinder 49 is an air cylinder similar to the drive transmission cylinder 47, and the rear end is fixed to the support plate 45 by pivot. The fixed cylinder 49 stops the movement of the crank mechanism 42 and the parallel link mechanism 43 and restricts the swinging movement of the suction cup 44. This fixed cylinder 49 is also connected to an air source via a speed exhaust controller 55 and a solenoid valve 56. Note that the electromagnetic valve 56 serves to temporarily stop the expansion and contraction of the fixed rod 49A during so-called recycling.

The connecting rod 42 </ b> B is connected to the triangular first connecting link 43 </ b> A of the parallel link mechanism 43, and the suction cup 44 is swung in the vertical direction by the parallel link mechanism 43. In the parallel link mechanism 43, a thick upper first link 43B and a lower thin second link 43C are connected in parallel by the triangular first connection link 43A and the second connection link 43D. A spring 50 is stretched between the first link 43B of the parallel link mechanism 43 and a frame (not shown), and the first link 43B is always urged clockwise. The clockwise rotation force of the parallel link mechanism 43 by the spring 50 is prevented by the stopper 51 from rotating more than a predetermined angle.

A guide bar 52 is installed horizontally on the upper shaft 43a connecting the first link 43B and the second connection link 43D so as to cross a storage box (not shown). A suction cup 44 is attached to the guide bar 52. A pair of mounting portions 53 for mounting are fixed. The suction cup 44 is fixed to the tip of the attachment portion 53 so that the suction portion 44A faces downward, and the air hose 54 is connected to the upper portion.

Next, the operation of the above configuration will be described.
First, the case where the packaging bag 10 normally laminated | stacked in the storage box of the packaging machine bag box is supplied to a rotary packaging machine is demonstrated. The expansion / contraction rod 47A is fixed by the electromagnetic valve 56, and on the contrary, the fixed cylinder 49 is allowed to freely expand and contract.

In the state shown by the phantom line of the parallel link mechanism 43, in order to supply the packaging bag 10 to the rotary type packaging machine, the suction cup 44 adsorbs one end of the packaging bag 10 and lifts it upward and stands by. The packaging bag 10 is supplied to a clamp arm of a rotary type packaging machine via a delivery mechanism (not shown).

When the supply of the packaging bag 10 to the clamp arm is completed, the suction cup 44 needs to rotate clockwise to pick up the uppermost packaging bag 10 in order to suck the next packaging bag 10. For this purpose, the swing arm 46 is rotated clockwise by the drive shaft 41 as shown by the solid line. The rotational force is transmitted to the rotating plate 42A of the crank mechanism 42 via the drive transmission cylinder 47, and further transmitted to the first connecting link 43A of the parallel link mechanism 43 via the connecting rod 42B.

Since the first connecting link 43A is rotated clockwise by the connecting rod 42B, the rotational force is transmitted to the parallel link mechanism 43 via the upper shaft 43b, and rotates to a position where the suction cup 44 can suck the packaging bag 10. . When the suction cup 44 sucks the packaging bag 10 and the drive shaft 41 rotates counterclockwise, the swing arm 46, the drive transmission cylinder 47, the crank mechanism 42, the parallel link mechanism 43, and the suction cup 44 are Since the operation reverse to the above is performed to return to the position indicated by the phantom line, the packaging bag 10 adsorbed by the suction cup 44 can be held again and supplied to the rotary packaging machine.

Normally, the above operation is repeated to supply the packaging bag 10 from the packaging machine bag box to the rotary packaging machine. However, as explained in the above-mentioned “Problem to be Solved by the Invention”, there is a filling error of the package of the rotary type packaging machine, the packaging bag 10 is recycled, and the unfilled packaging bag 10 becomes the packaging bag. When returning to the supply position, the supply of the packaging bag 10 from the packaging machine bag box needs to be stopped.

Therefore, when the packaging bag 10 is normally supplied to the rotary type packaging machine, the electromagnetic valve 56 allows the drive transmission cylinder 47 to freely expand and contract. However, if free expansion and contraction of the drive transmission cylinder 47 is permitted, the spring 50 always urges the parallel link mechanism 43 clockwise, and therefore the urging force causes the suction portion 44A of the suction cup 44 to move to the packaging bag 10. There is a risk of causing a displacement due to contact. Therefore, the fixed rod 49A is fixed in a contracted state by the electromagnetic valve 56 so that the crank mechanism 42 and the parallel link mechanism 43 are moved in a state indicated by phantom lines so as not to move, and the recycled unfilled packaging bag 10 is supplied. Wait to pass the position.

Before the next clamp reaches the supply position of the rotary packaging machine by intermittent rotation, the packaging machine bag box side needs to enter a system for normally supplying the packaging bag 10. For this purpose, the telescopic rod 47A is fixed by the electromagnetic valve 56, and conversely, the fixed cylinder 49 is freely expanded and contracted. When the drive shaft 41 rotates in the clockwise direction, the rotating plate 42A and the parallel link mechanism 43 rotate from the state indicated by the phantom line to the state indicated by the solid line, and the packaging bag 10 is picked up by the suction cup 44. The suction bag 44A sucks the packaging bag 10 and supplies it to the rotary packaging machine.

The crank mechanism 42 and the parallel link mechanism 43 are not limited to the shape and arrangement as shown in FIG. Further, the electromagnetic valve 56 may be provided separately for the drive transmission cylinder 47 and the fixed rod 49A.
Further, the mechanism is not limited to a cylinder such as the drive transmission cylinder 47 or the fixed cylinder 49 as long as it is a mechanism capable of transmitting or interrupting power instead of the drive transmission cylinder 47 or the fixed cylinder 49. For example, a configuration may be adopted in which the swing arm 46 and the crank mechanism 42 are connected or released by electromagnetic or electronic means.

INDUSTRIAL APPLICABILITY The present invention is useful as a bag box for a rotary packaging machine provided with a mechanism for recycling packaging bags that have been filled incorrectly.

10 Packaging bags
41 Drive shaft 42 Crank mechanism 42A Rotating plate 42B Connecting rod 43 Parallel link mechanism 44 Suction cup 46 Swing arm 47 Drive transmission cylinder (drive transmission mechanism)
49 Fixed cylinder (fixing mechanism)
50 Spring 56 Solenoid valve

Claims (2)

A bag box for a packaging machine in which a suction cup that sucks and lifts the packaging bag and supplies it to the packaging machine is disposed on the upper part of a storage box that stores the stacked packaging bags,
A crank mechanism for transmitting rotational force to the suction cup from a drive shaft that is rotated by a drive motor;
Between the drive shaft and the crank mechanism, a drive transmission mechanism for transmitting and blocking the drive force of the drive shaft is provided,
A bag box for a packaging machine, comprising: a fixing mechanism for fixing the crank mechanism so that the sucker presses an upper surface of the packaging bag by an empty operation so as not to cause a displacement . 2. The packaging machine according to claim 1, wherein the drive transmission mechanism and the fixing mechanism are air cylinders, and include an electromagnetic valve that stops expansion and contraction of these air cylinders and allows free expansion and contraction. Bag box.

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